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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: Console.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.cli;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.collect.Lists;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.io.File;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.io.IOException;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.io.InputStream;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.io.OutputStream;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.io.PrintWriter;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.ArrayList;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.util.List;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.jsimpledb.JSimpleDB;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import org.jsimpledb.core.Database;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.jsimpledb.parse.ParseContext;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.jsimpledb.parse.ParseException;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.jsimpledb.parse.util.AddPrefixFunction;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.slf4j.Logger;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.slf4j.LoggerFactory;<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>import jline.Terminal;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import jline.console.ConsoleReader;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import jline.console.UserInterruptException;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import jline.console.completer.Completer;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import jline.console.history.FileHistory;<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span>/**<a name="line.34"></a>
<span class="sourceLineNo">035</span> * CLI console.<a name="line.35"></a>
<span class="sourceLineNo">036</span> */<a name="line.36"></a>
<span class="sourceLineNo">037</span>public class Console {<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>    protected final Logger log = LoggerFactory.getLogger(this.getClass());<a name="line.39"></a>
<span class="sourceLineNo">040</span>    protected final ConsoleReader console;<a name="line.40"></a>
<span class="sourceLineNo">041</span>    protected final CliSession session;<a name="line.41"></a>
<span class="sourceLineNo">042</span><a name="line.42"></a>
<span class="sourceLineNo">043</span>    private final CommandParser commandParser = new CommandParser();<a name="line.43"></a>
<span class="sourceLineNo">044</span>    private final CommandListParser commandListParser = new CommandListParser(this.commandParser);<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    private FileHistory history;<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>    /**<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * Simplified constructor for core API CLI mode.<a name="line.49"></a>
<span class="sourceLineNo">050</span>     *<a name="line.50"></a>
<span class="sourceLineNo">051</span>     * @param db core API {@link Database}<a name="line.51"></a>
<span class="sourceLineNo">052</span>     * @param input console input<a name="line.52"></a>
<span class="sourceLineNo">053</span>     * @param output console output<a name="line.53"></a>
<span class="sourceLineNo">054</span>     * @throws IOException if an I/O error occurs<a name="line.54"></a>
<span class="sourceLineNo">055</span>     */<a name="line.55"></a>
<span class="sourceLineNo">056</span>    public Console(Database db, InputStream input, OutputStream output) throws IOException {<a name="line.56"></a>
<span class="sourceLineNo">057</span>        this(db, null, input, output, null, null, null);<a name="line.57"></a>
<span class="sourceLineNo">058</span>    }<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span>    /**<a name="line.60"></a>
<span class="sourceLineNo">061</span>     * Simplified constructor for {@link JSimpleDB} API CLI mode.<a name="line.61"></a>
<span class="sourceLineNo">062</span>     *<a name="line.62"></a>
<span class="sourceLineNo">063</span>     * @param jdb {@link JSimpleDB} database<a name="line.63"></a>
<span class="sourceLineNo">064</span>     * @param input console input<a name="line.64"></a>
<span class="sourceLineNo">065</span>     * @param output console output<a name="line.65"></a>
<span class="sourceLineNo">066</span>     * @throws IOException if an I/O error occurs<a name="line.66"></a>
<span class="sourceLineNo">067</span>     */<a name="line.67"></a>
<span class="sourceLineNo">068</span>    public Console(JSimpleDB jdb, InputStream input, OutputStream output) throws IOException {<a name="line.68"></a>
<span class="sourceLineNo">069</span>        this(null, jdb, input, output, null, null, null);<a name="line.69"></a>
<span class="sourceLineNo">070</span>    }<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span>    /**<a name="line.72"></a>
<span class="sourceLineNo">073</span>     * Generic constructor.<a name="line.73"></a>
<span class="sourceLineNo">074</span>     *<a name="line.74"></a>
<span class="sourceLineNo">075</span>     * @param db core API {@link Database}; must be null if and only if {@code jdb} is not null<a name="line.75"></a>
<span class="sourceLineNo">076</span>     * @param jdb {@link JSimpleDB} database; must be null if and only if {@code db} is not null<a name="line.76"></a>
<span class="sourceLineNo">077</span>     * @param input console input<a name="line.77"></a>
<span class="sourceLineNo">078</span>     * @param output console output<a name="line.78"></a>
<span class="sourceLineNo">079</span>     * @param terminal JLine terminal interface, or null for default<a name="line.79"></a>
<span class="sourceLineNo">080</span>     * @param encoding character encoding for {@code terminal}, or null for default<a name="line.80"></a>
<span class="sourceLineNo">081</span>     * @param appName JLine application name, or null for none<a name="line.81"></a>
<span class="sourceLineNo">082</span>     * @throws IOException if an I/O error occurs<a name="line.82"></a>
<span class="sourceLineNo">083</span>     * @throws IllegalArgumentException if {@code db} and {@code jdb} are both null or both not null<a name="line.83"></a>
<span class="sourceLineNo">084</span>     */<a name="line.84"></a>
<span class="sourceLineNo">085</span>    public Console(Database db, JSimpleDB jdb, InputStream input, OutputStream output,<a name="line.85"></a>
<span class="sourceLineNo">086</span>      Terminal terminal, String encoding, String appName) throws IOException {<a name="line.86"></a>
<span class="sourceLineNo">087</span>        if (!((jdb == null) ^ (db == null)))<a name="line.87"></a>
<span class="sourceLineNo">088</span>            throw new IllegalArgumentException("exactly one of db or jdb must be null");<a name="line.88"></a>
<span class="sourceLineNo">089</span>        if (input == null)<a name="line.89"></a>
<span class="sourceLineNo">090</span>            throw new IllegalArgumentException("null input");<a name="line.90"></a>
<span class="sourceLineNo">091</span>        if (output == null)<a name="line.91"></a>
<span class="sourceLineNo">092</span>            throw new IllegalArgumentException("null output");<a name="line.92"></a>
<span class="sourceLineNo">093</span>        this.console = new ConsoleReader(appName, input, output, terminal, encoding);<a name="line.93"></a>
<span class="sourceLineNo">094</span>        this.console.setBellEnabled(true);<a name="line.94"></a>
<span class="sourceLineNo">095</span>        this.console.setHistoryEnabled(true);<a name="line.95"></a>
<span class="sourceLineNo">096</span>        this.console.setHandleUserInterrupt(true);<a name="line.96"></a>
<span class="sourceLineNo">097</span>        final PrintWriter writer = new PrintWriter(console.getOutput(), true);<a name="line.97"></a>
<span class="sourceLineNo">098</span>        this.session = jdb != null ? new CliSession(jdb, writer) : new CliSession(db, writer);<a name="line.98"></a>
<span class="sourceLineNo">099</span>    }<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span>    /**<a name="line.101"></a>
<span class="sourceLineNo">102</span>     * Get the associated JLine {@link ConsoleReader}.<a name="line.102"></a>
<span class="sourceLineNo">103</span>     *<a name="line.103"></a>
<span class="sourceLineNo">104</span>     * @return associated console reader<a name="line.104"></a>
<span class="sourceLineNo">105</span>     */<a name="line.105"></a>
<span class="sourceLineNo">106</span>    public ConsoleReader getConsoleReader() {<a name="line.106"></a>
<span class="sourceLineNo">107</span>        return this.console;<a name="line.107"></a>
<span class="sourceLineNo">108</span>    }<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span>    /**<a name="line.110"></a>
<span class="sourceLineNo">111</span>     * Get the associated {@link CliSession}.<a name="line.111"></a>
<span class="sourceLineNo">112</span>     *<a name="line.112"></a>
<span class="sourceLineNo">113</span>     * @return associated CLI session<a name="line.113"></a>
<span class="sourceLineNo">114</span>     */<a name="line.114"></a>
<span class="sourceLineNo">115</span>    public CliSession getSession() {<a name="line.115"></a>
<span class="sourceLineNo">116</span>        return this.session;<a name="line.116"></a>
<span class="sourceLineNo">117</span>    }<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span>    /**<a name="line.119"></a>
<span class="sourceLineNo">120</span>     * Configure the command history file.<a name="line.120"></a>
<span class="sourceLineNo">121</span>     *<a name="line.121"></a>
<span class="sourceLineNo">122</span>     * @param historyFile file for storing command history<a name="line.122"></a>
<span class="sourceLineNo">123</span>     */<a name="line.123"></a>
<span class="sourceLineNo">124</span>    public void setHistoryFile(File historyFile) {<a name="line.124"></a>
<span class="sourceLineNo">125</span>        if (this.history != null)<a name="line.125"></a>
<span class="sourceLineNo">126</span>            throw new IllegalStateException("history file already configured");<a name="line.126"></a>
<span class="sourceLineNo">127</span>        try {<a name="line.127"></a>
<span class="sourceLineNo">128</span>            this.history = new FileHistory(historyFile);<a name="line.128"></a>
<span class="sourceLineNo">129</span>        } catch (IOException e) {<a name="line.129"></a>
<span class="sourceLineNo">130</span>            // ignore<a name="line.130"></a>
<span class="sourceLineNo">131</span>        }<a name="line.131"></a>
<span class="sourceLineNo">132</span>        this.console.setHistory(this.history);<a name="line.132"></a>
<span class="sourceLineNo">133</span>    }<a name="line.133"></a>
<span class="sourceLineNo">134</span><a name="line.134"></a>
<span class="sourceLineNo">135</span>    /**<a name="line.135"></a>
<span class="sourceLineNo">136</span>     * Run this instance. This method blocks until the connected user exits the console.<a name="line.136"></a>
<span class="sourceLineNo">137</span>     *<a name="line.137"></a>
<span class="sourceLineNo">138</span>     * @throws IOException if an I/O error occurs<a name="line.138"></a>
<span class="sourceLineNo">139</span>     */<a name="line.139"></a>
<span class="sourceLineNo">140</span>    public void run() throws IOException {<a name="line.140"></a>
<span class="sourceLineNo">141</span><a name="line.141"></a>
<span class="sourceLineNo">142</span>        // Input buffer<a name="line.142"></a>
<span class="sourceLineNo">143</span>        final StringBuilder lineBuffer = new StringBuilder();<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>        // Set up tab completion<a name="line.145"></a>
<span class="sourceLineNo">146</span>        console.addCompleter(new ConsoleCompleter(lineBuffer));<a name="line.146"></a>
<span class="sourceLineNo">147</span><a name="line.147"></a>
<span class="sourceLineNo">148</span>        // Main command loop<a name="line.148"></a>
<span class="sourceLineNo">149</span>        try {<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span>            this.console.println("Welcome to JSimpleDB. You are in "<a name="line.151"></a>
<span class="sourceLineNo">152</span>              + (this.session.hasJSimpleDB() ? "JSimpleDB" : "Core API") + " CLI Mode. Type `help' for help.");<a name="line.152"></a>
<span class="sourceLineNo">153</span>            this.console.println();<a name="line.153"></a>
<span class="sourceLineNo">154</span>            while (!session.isDone()) {<a name="line.154"></a>
<span class="sourceLineNo">155</span><a name="line.155"></a>
<span class="sourceLineNo">156</span>                // Read command line<a name="line.156"></a>
<span class="sourceLineNo">157</span>                String line;<a name="line.157"></a>
<span class="sourceLineNo">158</span>                try {<a name="line.158"></a>
<span class="sourceLineNo">159</span>                    line = this.console.readLine(lineBuffer.length() == 0 ? "JSimpleDB&gt; " : "        -&gt; ");<a name="line.159"></a>
<span class="sourceLineNo">160</span>                } catch (UserInterruptException e) {<a name="line.160"></a>
<span class="sourceLineNo">161</span>                    this.console.print("^C");<a name="line.161"></a>
<span class="sourceLineNo">162</span>                    line = null;<a name="line.162"></a>
<span class="sourceLineNo">163</span>                }<a name="line.163"></a>
<span class="sourceLineNo">164</span>                if (line == null) {<a name="line.164"></a>
<span class="sourceLineNo">165</span>                    this.console.println();<a name="line.165"></a>
<span class="sourceLineNo">166</span>                    break;<a name="line.166"></a>
<span class="sourceLineNo">167</span>                }<a name="line.167"></a>
<span class="sourceLineNo">168</span><a name="line.168"></a>
<span class="sourceLineNo">169</span>                // Detect backslash continuations<a name="line.169"></a>
<span class="sourceLineNo">170</span>                boolean continuation = false;<a name="line.170"></a>
<span class="sourceLineNo">171</span>                if (line.length() &gt; 0 &amp;&amp; line.charAt(line.length() - 1) == '\\') {<a name="line.171"></a>
<span class="sourceLineNo">172</span>                    line = line.substring(0, line.length() - 1) + "\n";<a name="line.172"></a>
<span class="sourceLineNo">173</span>                    continuation = true;<a name="line.173"></a>
<span class="sourceLineNo">174</span>                }<a name="line.174"></a>
<span class="sourceLineNo">175</span><a name="line.175"></a>
<span class="sourceLineNo">176</span>                // Append line to buffer<a name="line.176"></a>
<span class="sourceLineNo">177</span>                lineBuffer.append(line);<a name="line.177"></a>
<span class="sourceLineNo">178</span><a name="line.178"></a>
<span class="sourceLineNo">179</span>                // Handle backslash continuations<a name="line.179"></a>
<span class="sourceLineNo">180</span>                if (continuation)<a name="line.180"></a>
<span class="sourceLineNo">181</span>                    continue;<a name="line.181"></a>
<span class="sourceLineNo">182</span>                final ParseContext ctx = new ParseContext(lineBuffer.toString());<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>                // Skip initial whitespace<a name="line.184"></a>
<span class="sourceLineNo">185</span>                ctx.skipWhitespace();<a name="line.185"></a>
<span class="sourceLineNo">186</span><a name="line.186"></a>
<span class="sourceLineNo">187</span>                // Ignore blank input<a name="line.187"></a>
<span class="sourceLineNo">188</span>                if (ctx.getInput().length() == 0)<a name="line.188"></a>
<span class="sourceLineNo">189</span>                    continue;<a name="line.189"></a>
<span class="sourceLineNo">190</span><a name="line.190"></a>
<span class="sourceLineNo">191</span>                // Parse command(s)<a name="line.191"></a>
<span class="sourceLineNo">192</span>                final ArrayList&lt;CliSession.Action&gt; actions = new ArrayList&lt;&gt;();<a name="line.192"></a>
<span class="sourceLineNo">193</span>                final boolean[] needMoreInput = new boolean[1];<a name="line.193"></a>
<span class="sourceLineNo">194</span>                final boolean ok = this.session.perform(new CliSession.Action() {<a name="line.194"></a>
<span class="sourceLineNo">195</span>                    @Override<a name="line.195"></a>
<span class="sourceLineNo">196</span>                    public void run(CliSession session) {<a name="line.196"></a>
<span class="sourceLineNo">197</span>                        try {<a name="line.197"></a>
<span class="sourceLineNo">198</span>                            actions.addAll(Console.this.commandListParser.parse(session, ctx, false));<a name="line.198"></a>
<span class="sourceLineNo">199</span>                        } catch (ParseException e) {<a name="line.199"></a>
<span class="sourceLineNo">200</span>                            if (ctx.getInput().length() == 0)<a name="line.200"></a>
<span class="sourceLineNo">201</span>                                needMoreInput[0] = true;<a name="line.201"></a>
<span class="sourceLineNo">202</span>                            else<a name="line.202"></a>
<span class="sourceLineNo">203</span>                                throw e;<a name="line.203"></a>
<span class="sourceLineNo">204</span>                        }<a name="line.204"></a>
<span class="sourceLineNo">205</span>                    }<a name="line.205"></a>
<span class="sourceLineNo">206</span>                });<a name="line.206"></a>
<span class="sourceLineNo">207</span>                if (needMoreInput[0]) {<a name="line.207"></a>
<span class="sourceLineNo">208</span>                    lineBuffer.append('\n');<a name="line.208"></a>
<span class="sourceLineNo">209</span>                    continue;<a name="line.209"></a>
<span class="sourceLineNo">210</span>                }<a name="line.210"></a>
<span class="sourceLineNo">211</span>                lineBuffer.setLength(0);<a name="line.211"></a>
<span class="sourceLineNo">212</span>                if (!ok)<a name="line.212"></a>
<span class="sourceLineNo">213</span>                    continue;<a name="line.213"></a>
<span class="sourceLineNo">214</span><a name="line.214"></a>
<span class="sourceLineNo">215</span>                // Execute commands<a name="line.215"></a>
<span class="sourceLineNo">216</span>                for (CliSession.Action action : actions) {<a name="line.216"></a>
<span class="sourceLineNo">217</span>                    if (!this.session.perform(action))<a name="line.217"></a>
<span class="sourceLineNo">218</span>                        break;<a name="line.218"></a>
<span class="sourceLineNo">219</span>                }<a name="line.219"></a>
<span class="sourceLineNo">220</span><a name="line.220"></a>
<span class="sourceLineNo">221</span>                // Proceed<a name="line.221"></a>
<span class="sourceLineNo">222</span>                this.console.flush();<a name="line.222"></a>
<span class="sourceLineNo">223</span>            }<a name="line.223"></a>
<span class="sourceLineNo">224</span>        } finally {<a name="line.224"></a>
<span class="sourceLineNo">225</span>            if (this.history != null)<a name="line.225"></a>
<span class="sourceLineNo">226</span>                this.history.flush();<a name="line.226"></a>
<span class="sourceLineNo">227</span>            this.console.flush();<a name="line.227"></a>
<span class="sourceLineNo">228</span>            this.console.shutdown();<a name="line.228"></a>
<span class="sourceLineNo">229</span>        }<a name="line.229"></a>
<span class="sourceLineNo">230</span>    }<a name="line.230"></a>
<span class="sourceLineNo">231</span><a name="line.231"></a>
<span class="sourceLineNo">232</span>    /**<a name="line.232"></a>
<span class="sourceLineNo">233</span>     * Parse the given command(s) within a transaction.<a name="line.233"></a>
<span class="sourceLineNo">234</span>     *<a name="line.234"></a>
<span class="sourceLineNo">235</span>     * @param text command input<a name="line.235"></a>
<span class="sourceLineNo">236</span>     * @return command actions, or null if there is an error during the transaction<a name="line.236"></a>
<span class="sourceLineNo">237</span>     * @throws ParseException if {@code text} cannot be parsed<a name="line.237"></a>
<span class="sourceLineNo">238</span>     * @throws IllegalArgumentException if {@code text} is null<a name="line.238"></a>
<span class="sourceLineNo">239</span>     */<a name="line.239"></a>
<span class="sourceLineNo">240</span>    public List&lt;CliSession.Action&gt; parseCommand(String text) {<a name="line.240"></a>
<span class="sourceLineNo">241</span>        if (text == null)<a name="line.241"></a>
<span class="sourceLineNo">242</span>            throw new IllegalArgumentException("null text");<a name="line.242"></a>
<span class="sourceLineNo">243</span>        final ParseContext ctx = new ParseContext(text);<a name="line.243"></a>
<span class="sourceLineNo">244</span>        final ArrayList&lt;CliSession.Action&gt; actions = new ArrayList&lt;&gt;();<a name="line.244"></a>
<span class="sourceLineNo">245</span>        return this.session.perform(new CliSession.Action() {<a name="line.245"></a>
<span class="sourceLineNo">246</span>            @Override<a name="line.246"></a>
<span class="sourceLineNo">247</span>            public void run(CliSession session) {<a name="line.247"></a>
<span class="sourceLineNo">248</span>                actions.addAll(commandListParser.parse(session, ctx, false));<a name="line.248"></a>
<span class="sourceLineNo">249</span>            }<a name="line.249"></a>
<span class="sourceLineNo">250</span>        }) ? actions : null;<a name="line.250"></a>
<span class="sourceLineNo">251</span>    }<a name="line.251"></a>
<span class="sourceLineNo">252</span><a name="line.252"></a>
<span class="sourceLineNo">253</span>// ConsoleCompleter<a name="line.253"></a>
<span class="sourceLineNo">254</span><a name="line.254"></a>
<span class="sourceLineNo">255</span>    private class ConsoleCompleter implements Completer {<a name="line.255"></a>
<span class="sourceLineNo">256</span><a name="line.256"></a>
<span class="sourceLineNo">257</span>        private final StringBuilder lineBuffer;<a name="line.257"></a>
<span class="sourceLineNo">258</span><a name="line.258"></a>
<span class="sourceLineNo">259</span>        ConsoleCompleter(StringBuilder lineBuffer) {<a name="line.259"></a>
<span class="sourceLineNo">260</span>            this.lineBuffer = lineBuffer;<a name="line.260"></a>
<span class="sourceLineNo">261</span>        }<a name="line.261"></a>
<span class="sourceLineNo">262</span><a name="line.262"></a>
<span class="sourceLineNo">263</span>        @Override<a name="line.263"></a>
<span class="sourceLineNo">264</span>        public int complete(final String buffer, final int cursor, final List&lt;CharSequence&gt; candidates) {<a name="line.264"></a>
<span class="sourceLineNo">265</span>            final int[] result = new int[1];<a name="line.265"></a>
<span class="sourceLineNo">266</span>            Console.this.session.perform(new CliSession.Action() {<a name="line.266"></a>
<span class="sourceLineNo">267</span>                @Override<a name="line.267"></a>
<span class="sourceLineNo">268</span>                public void run(CliSession session) {<a name="line.268"></a>
<span class="sourceLineNo">269</span>                    result[0] = ConsoleCompleter.this.completeInTransaction(session, buffer, cursor, candidates);<a name="line.269"></a>
<span class="sourceLineNo">270</span>                }<a name="line.270"></a>
<span class="sourceLineNo">271</span>            });<a name="line.271"></a>
<span class="sourceLineNo">272</span>            return result[0];<a name="line.272"></a>
<span class="sourceLineNo">273</span>        }<a name="line.273"></a>
<span class="sourceLineNo">274</span><a name="line.274"></a>
<span class="sourceLineNo">275</span>        private int completeInTransaction(CliSession session, String buffer, int cursor, List&lt;CharSequence&gt; candidates) {<a name="line.275"></a>
<span class="sourceLineNo">276</span>            final ParseContext ctx = new ParseContext(this.lineBuffer + buffer.substring(0, cursor));<a name="line.276"></a>
<span class="sourceLineNo">277</span>            try {<a name="line.277"></a>
<span class="sourceLineNo">278</span>                Console.this.commandListParser.parse(session, ctx, true);<a name="line.278"></a>
<span class="sourceLineNo">279</span>            } catch (ParseException e) {<a name="line.279"></a>
<span class="sourceLineNo">280</span>                String prefix = "";<a name="line.280"></a>
<span class="sourceLineNo">281</span>                int index = ctx.getIndex();<a name="line.281"></a>
<span class="sourceLineNo">282</span>                while (index &gt; 0 &amp;&amp; Character.isJavaIdentifierPart(ctx.getOriginalInput().charAt(index - 1)))<a name="line.282"></a>
<span class="sourceLineNo">283</span>                    prefix = ctx.getOriginalInput().charAt(--index) + prefix;<a name="line.283"></a>
<span class="sourceLineNo">284</span>                candidates.addAll(Lists.transform(e.getCompletions(), new AddPrefixFunction(prefix)));<a name="line.284"></a>
<span class="sourceLineNo">285</span>                return index;<a name="line.285"></a>
<span class="sourceLineNo">286</span>            } catch (Exception e) {<a name="line.286"></a>
<span class="sourceLineNo">287</span>                try {<a name="line.287"></a>
<span class="sourceLineNo">288</span>                    Console.this.console.println();<a name="line.288"></a>
<span class="sourceLineNo">289</span>                    Console.this.console.println("Error: got exception calculating command line completions");<a name="line.289"></a>
<span class="sourceLineNo">290</span>                    e.printStackTrace(session.getWriter());<a name="line.290"></a>
<span class="sourceLineNo">291</span>                } catch (IOException e2) {<a name="line.291"></a>
<span class="sourceLineNo">292</span>                    // ignore<a name="line.292"></a>
<span class="sourceLineNo">293</span>                }<a name="line.293"></a>
<span class="sourceLineNo">294</span>            }<a name="line.294"></a>
<span class="sourceLineNo">295</span>            return cursor;<a name="line.295"></a>
<span class="sourceLineNo">296</span>        }<a name="line.296"></a>
<span class="sourceLineNo">297</span>    }<a name="line.297"></a>
<span class="sourceLineNo">298</span>}<a name="line.298"></a>
<span class="sourceLineNo">299</span><a name="line.299"></a>




























































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